GLDD Institutional Ownership

GREAT LAKES DREDGE & DOCK CO

GLDD institutional ownership at a glance

Follow GREAT LAKES DREDGE & DOCK CO institutional ownership through recent Schedule 13G and 13D filings. Compare reported shares, ownership percentages, filing dates, and changes in beneficial ownership over time.

Latest filing: Dimensional Fund Advisors filed Schedule 13G amendment on Jul 14, 2026, reporting 1 shares and 0.00% beneficial ownership.

Browse recent ownership filings How Schedule 13G works Why a 13G is not a trade report

How to read Schedule 13 ownership changes

Schedule 13G/13D reports beneficial ownership at an observation date. “Accumulation” or “reduction” is inferred from changes in reported shares when available; it is not a list of individual trades or exact execution prices.

Form 13F rows are quarter-end holding context only and do not establish an exact entry date.

For more context, see how to read a Schedule 13G, filing date vs event date, or Schedule 13G vs Schedule 13D.

Current ownership filings and reported ownership changes are available on free access. Investor and Pro add filing-specific significance scoring, disclosure-speed analysis, confirmation/divergence signals, and alerts. The overall institutional consensus preview remains public. Compare plans.

Cross-institution intelligence

Institutional Research

This gauge summarizes recent agreement across tracked institutional activity.

Latest filing Jul 14, 2026

Public consensus preview Broad reduction 12/100 institutional research score

2 tracked institutions Latest filing Jul 14, 2026

1 reducing, 1 exited across 2 comparable institutions.

Accumulating0

Unchanged0

Reducing1

Exited1

The overall consensus is public. Detailed holder comparisons, breadth history, ownership charts, and filing-specific signal analysis remain part of Investor and Pro research.

Price context

52-week position is market context and does not change the institutional consensus score.

52-week range data is not available for this security yet.

Tracked institutions

Public holder names and filing freshness. Detailed institution-by-institution analysis is locked.

Latest observation Jun 30, 2026

BlackRock Jan 24, 2024 filed

BlackRock Apr 28, 2026 filed

Dimensional Fund Advisors Jul 14, 2026 filed

Detailed institutional research

See what is driving the consensus.

Unlock holder-by-holder changes, ownership history, breadth by period, disclosure timing, and filing-specific signal analysis.

Create free account Compare Investor and Pro

A free account adds watchlists, portfolio tools, and the first live gauge on the default tracker. Investor or Pro reveals research gauges across tracker views and unlocks the detailed research above.

Beneficial ownership filing history

Showing 3 of 7 filing(s) · 4 older require more history access

Holder	Observed / filed	Reported change	Shares	Ownership
Dimensional Fund Advisors CIK0000354204	Jun 30, 2026 observed Jul 14, 2026 filed · 14d Schedule 13G amendment	Exit below reporting threshold	1 -3.4M	0.00% -5.10 pts
BlackRock CIK0002012383	Mar 31, 2026 observed Apr 28, 2026 filed · 28d Schedule 13G amendment	Reported reduction	5.5M -1.2M	12.00% 0.00 pts
Dimensional Fund Advisors CIK0000354204	Mar 31, 2026 observed Apr 9, 2026 filed · 9d Schedule 13G amendment	Earliest Schedule 13G amendment found	3.4M	5.10%

Explore more institutional activity

Related research

Compare GLDD with other securities showing similar institutional activity or recent accumulation across several tracked institutions.

Similar institutional activity

ATROB ASTRONICS CORP-CL B 12/100 Broad reduction RPC RIDGEPOST CAPITAL INC-A 12/100 Broad reduction OXM OXFORD INDUSTRIES INC 12/100 Broad reduction RL RALPH LAUREN CORP 12/100 Broad reduction

Recent multi-institution accumulation

OCGN OCUGEN INC 2 accumulating Aug 7, 2026 DNTH Dianthus Therapeutics, Inc. /DE/ 2 accumulating Aug 7, 2026 SRPT Sarepta Therapeutics, Inc. 2 accumulating Aug 7, 2026 RARE ULTRAGENYX PHARMACEUTICAL IN 2 accumulating Aug 7, 2026